1939 Holster

[Ingvarg]

Hi

What can you experts tell me about this 1939 holster ?
I am new to this and all I know is that it look like its made by Carl Busse Mainz and there seems to be some small and faded letters below the eagle and svatzika. Last one seems to be "6"
Inside someone has written with a pen, a number, (possible the pistol #) and maybe a name.
Looks like black on the pics, but the real colour is dark brown.






Any info would be appriciated.

Thanks and all the best from Iceland.
Ingvar.